After-pressing device for presses.



No. 723,506. PATENTED MARL24. 1903..

" F. WALLI.

AFTER PRESSIN-G DEVICE FOR PRESSES.

APPLICATION FILED NOV. 5, 1900. 10 MODEL.

F\\\\\\\\\\\\\ v K 5? ft? C \j df l f v W UNITED STATES PATENT OFFICE.

FERDINAND WALLY, OF RAFINGL NEAR PULKAU, AUSTRIA-HUN GARY.

AFTER-PRESSING DEVICE FOR PRESSES.

SPECIFICATION forming part of Letters Patent No. 723,506, dated March 24, 1903.

Application filed November 5, 1900. Serial No. 35,573. (N0 model.)

To all whom it may concern.-

innkeeper, a citizen of Austria, residing at Rating, near Pulkau, Province of LowerAus-' tria, Austria-Hungary, have invented certain new and useful Improvements in After-Pressing Devices for Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention,'such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to an after-pressing device for all kinds of presses; and it consists of a block inserted between the pressplate and the pressing mechanism, (lever, press-ram, eccentric, &c.,) which by means of its special construction and springs finishes the operation of pressing when the pressing mechanism ceases to work.

In the accompanying drawings such a device is represented in Figure l longitudinally sectioned with springs under tension, in Fig. 2 with springs partially relieved from tension. Fig. 3 shows the press-block in plan View. Fig. 4 is a side view of a complete press provided with the after-pressin g device.

On the side of the press-plate a, opposite to the material, a block a is fixed and provided with openings or recesses c c for one or more springs b b and guide-pins f f, which block 0 is covered with a plate d, operated upon by the press mechanism-as, for instance, a thread- I ed spindle e.

The springs bmay be of any form-as, for instance, of the spiral form shownone end bearing against the plate (1 and the opposite end against the bottom of the recesses in which saidspringsarecontained. When thesprings are fully compressed, so that plate (1 rests upon the upper surface of block 0, said plate can be secured in said position by means of bolts g, which can be inserted in the alined openings g in the pinsf and openings 9 in the block 0. If desired, any other means may be used for fixing the plate (2 in the position seen in Fig. 1.

This device operates as follows: Before the beginning of the process of pressing the springs inclosed in the block are kept under tension by means of the pins g and now the press-plate is moved down against the material and the pressing mechanism. If an increase of pressure is not possible, the pins 9 are withdrawn and the springs by reason of their expansive tendency exert a continuous pressure on the material. The springs will expand proportionally to the compression of the material, and thus they efiect a constant after-pressing until the springs have completely expanded. Suitable means may be used for preventing complete separation of block a from plate cZas, for instance, by providing heads g on the pinsf, which heads engage with the shoulders g at the upper end of the recesses 0 The pins g are inserted in the openings in the guide-pins and block when it is not desired that there be an afterpressin g action of the device.

What I claim is 1. In a device of the character described, the combination with a press-plate, of a block provided with openings or recesses 0 c springs b seated in the recesses c, guide-pins arranged and adapted for movement in the recesses 0 a plate (I mounted on the guidepins and bearing against one end of the springs 19 and means for operating the plate cl.

2. In a device of the character described, the combination with a press-plate, of a block provided with openings or recesses c 0 springs '12 seated in the'recesses c, guide-pins arranged and adapted'for' movement'in the recesses 0 a plate d mounted onthe guidepins and bearing against one end of the springs b and means for operating the plate d, and means for retaining the plate 01 against the block with the springs in compressed condition, consisting of pins 9 adapted to be inserted in alined openings in the guide-pins and block.

In testimony that I claim the foregoing as my invention I have signed my name in pres ence of two subscribing witnesses.

FERDINAND WALLY. W'itnesses:

WILHELM BERGER, ALVESTO S. HOGUE. 

